Your source for
Frequency Stability Analysis
Hamilton Technical Services
650 Distant Island Drive
Beaufort, SC 29907 USA
- Request an update to Stable32 Version 1.59 (licensed Stable32 users
- Buy a printed version of the Stable32 User Manual.
- Take a virtual tour of the Stable32 program. Tour
- Download a copy of NIST Special Publication 1065,
Frequency Stability Analysis.
- General Information
General information about Hamilton Technical Services.
- Products Information
about our software products.
- Papers On-line papers
about frequency stability analysis.
- Data Test data for
frequency stability analysis.
- Software Updates for
the Stable program and documentation.
- Links Links to other web
sites with time and frequency information.
- Contact Information How to contact
General Information Hamilton Technical
Services develops and markets software for frequency stability analysis. This
web page contains data sheets for the Stable32 program, test data files, free
software updates, on-line papers providing information about frequency
stability analysis, and links to other sites involving precise time and
|Our premier product is Stable32, a full-featured
Windows® program that provides all the functions needed to perform
time-domain analysis of frequency stability data. Click on the links
below to obtain a data sheet and ordering information, or a pdf brochure, for
Click on the following link to take a virtual tour of the
Many leading government and commercial time and frequency
laboratories use the Stable programs for frequency stability analysis.
Papers and PublicationsThe following papers and publications contain information
related to frequency stability analysis:
- W. J. Riley, "The Calculation of Time Domain
- W.J. Riley, "The Basics of Frequency
- W.J. Riley, "The Hadamard Variance".
- W.J. Riley, "Methodologies for Time
Domain Frequency Stability Measurement and Analysis".
- W.J. Riley,
"Stable32 Frequency Domain Functions".
- W.J. Riley,
"Properties of FFT Windows Used in Stable32".
- W.J. Riley,
"Evaluating the Level of Discrete Components in Stable32 PSD Plots".
- W.J. Riley, "Stable32 Automation
- W.J. Riley, "Launching and Opening Data Files in
- W.J. Riley, "Using WinBatch to Automate a Stable32
Frequency Stability Analysis".
- W.J. Riley, "Confidence Intervals and Bias
Corrections for the Stable32 Variance Functions".
- W.J. Riley, "Application of the 3-Cornered
Hat Method to the Analysis Of Frequency Stability".
- W.J. Riley, "Gaps, Outliers, Dead Time, and Uneven
Spacing in Frequency Stability Data".
- W.J. Riley, "References for Frequency Stability
- W.J. Riley, "Techniques for Frequency
- W.J. Riley, "Use of the Autocorrelation Function
for Frequency Stability Analysis".
- W.J. Riley, "Curve
Fitting Features in Stable32".
- W.J. Riley, "The FrequenC
- W.J. Riley,
"Capturing Data from Symmetricom Phase Noise and Allan Deviation Test Sets for
Analysis by Stable32".
- W.J. Riley, "Algorithms for Frequency Jump
- W.J. Riley, "Frequency Jump
Detection and Analysis".
- W.J. Riley,
"Frequency Jump Detection in Stable32".
- W.J. Riley, "Calculation
Times in Stable32".
Riley, "Spur Detection, Analysis and Removal in Stable32".
- W.J. Riley, "The Stable32
- W.J. Riley,
Handbook of Frequency Stability Analysis. You can buy a printed copy
of this book at Handbook, and
download it as NIST Special Publication 1065.
- W.J. Riley, "The Quartz Crystal Anomaly Detector".
- W.J Riley, "A Small DMTD System".
- W.J. Riley, "Examples of 1 PPS Clock Measuring Systems".
- W.J. Riley, "PICTIC Interpolator Linearity".
- W.J. Riley, "The Averaging of Phase and Frequency Data".
- W.J. Riley, "A Simple USB RF Power Meter".
- W.J. Riley, "A 10 MHz OCVCXO and PLL Module".
- W.J. Riley, "An Octal 10 MHz Distribution Amplifier".
- W.J. Riley, "Clock Measurements Using the BI220 TIA".
- W.J. Riley, "TDEV and MTIE Measurements Using the BI220 TIA".
- W.J. Riley, "Clock Measurements Using the GT210 Universal Counter and Stable32".
- W.J. Riley, "Frequency Stability Measurements Using a Tight Phase Lock Loop".
- W.J. Riley, "Clock Measurements Using the TimePod 5330A with TimeLab and Stable32".
- D.B Sullivan, D.W Allan, D.A. Howe and F.L.Walls (Editors),"Characterization of Clocks and Oscillators",
NIST Technical Note 1337, U.S. Department of Commerce, National Institute of Standards and
Technology, March 1990.
- C.A Greenhall, D.A. Howe and D.B. Percival,
"Total Variance, an Estimator of Long-Term Frequency Stability".
- D. Howe, et al., "A Total Estimator of
the Hadamard Function Used For GPS Operations".
Greenhall and W.J. Riley, "Uncertainty of Stability Variances Based on Finite
Differences" and Accompanying Software: EDF Program,
Help File, Source Code.
- W.J. Riley and C.A. Greenhall, "Power
Law Noise Identification Using the Lag 1 Autocorrelation".
- D.W. Allan, N. Ashby and C.C. Hodge, "The Science of Timekeeping", Hewlett-Packard
Company Application Note 1289.
- J.R. Vig,
"Quartz Crystal Resonators and Oscillators For Frequency Control and Timing
Applications - A Tutorial".
- J.A. DeYoung,
"Discrete Simulated Power Law Data in the Time-Domain Using the Kasdin and
Walter (1992) Method". An animated
example of simulated power law data using the same method employed in
- An excerpt from NBS Monograph 140 containing the classic
Annex 8.E example for the calculation of the
Data The following files contain test data for
frequency stability analysis:
- NBS Data The classic set of nine 3-digit numbers
from Annex 8.E of NBS Monograph 140
- Test Suite Data A test suite of 1000
pseudo-random frequency data points
Software and Documentation
A free download is available to update from
Version 1.58 of Stable32 to Version 1.59 of 03/04/12. This
release includes a choice of plot styles, calculation of the Greenhall drift
and new command line function execution commands. See the included Stable32
Version 1.59 User Manual Addendum file for more information. This download is
also available for earlier versions of Stable32 at a modest price. Please
request this update by sending an e-mail to the address below, including your
Stable32 version and serial number located at the back of the User Manual. See
Update.htm for more information about the Stable32
The Stable32 User Manual may be downloaded as an Adobe
PDF document. This is an electronic version of the printed book below.
A printed version of the Stable32 User Manual is available for
A free MJD/DOY calendar utility for Windows 95 and
above is available for downloading. Click on the link below to download the file
22MJDate.exe to a working directory on your hard disk, and then run
it to install the MJDate program.
Links The following links connect to sites
which contain information related to precise time and frequency control:
- BIPM Bureau International des Poids et Mesures
- BNM-LPTF Paris Observatory (France)
- EFTF European Frequency and Time Forum
- GPS Global Positioning System Operations (USNO)
- IEEE Institute of Electrical and Electronic Engineers
- IEN Istituto Elettrotecnico Nazionale Galileo
- IERS International Earth Rotation Service
- ION Institute of Navigation
- JPL Jet Propulsion Laboratory
- MJD Get current Modified Julian Date fron USNO
- NIST National Institute of Standards and Technology
- NGA National Geospatial-Intelligence Agancy (Formerly
- NPL National Physical Laboratory (UK)
- NRC National Research Council (Canada)
- NRL Naval Research Laboratory
- Official U.S. Time
- PTB Physikalisch-Technische Bundesanstalt (Germany)
- PTTI Precise Time and Time Interval Applications and
- SP Swedish National Testing and Research Institute
- UFFC Ultrasonics, Ferroelectrics and Frequency
Control Society (IEEE)
- USCG U.S. Coast Guard Navigation Center
- USNO U.S. Naval Observatory Time Service Department
- UTC Offsets and Step
Adjustments of UTC
||William J. Riley
||650 Distant Island Drive
E-Mail address to
compose an e-mail message to
Copyright 1997-2012 Hamilton Technical Services